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US3944155A
Expired / Lapsed
US
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Ribbon spool
Assignee: BARCLAYSAMERICAN/BUSINESS CREDIT INC 530 NORTH WATER STMILWAUKEE WS A CORP OF CT
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Filing: 1974-04-22
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Granted: 1976-03-16
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Expires: 1994-04-22
Abstract
Abstract One piece ribbon spool molded from suitable plastic, with no fastening hardware with spool or on ribbon required, comprising spaced circular side guide flanges, a central cylindrical hub joined by radial ribs with ribbon-receiving segmental cylindrical wall, a female ribbon latch forming a hook for receiving free end of a male ribbon latch to anchor end of ribbon therebetween, other end of male latch forming unitary hinge connection, and outer surfaces of latches when in ribbon-anchoring position describing extension of cylindrical surface of segmental ribbon-receiving wall, the male latch being narrower than the space separating the side flanges, and apertures in the latter opposite the latches to facilitate engagement and disengagement of the ribbon and the spool.
Inventors
- 👤 Robert Hugh Wilczewski
- 👤 Rudolf Karl Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:47
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H75/28; B65H2301/00; B65H2301/40; B65H2301/41; B65H2301/414; B65H2301/41419; B65H2301/41422; B65H2301/414225
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
A one piece plastic spool for an inking ribbon, comprising a pair of parallel side guide flanges, a central cylindrical hub, a segmental cylindrical wall spaced outwardly from said hub interconnecting said side flanges and having a ribbon-receiving peripheral surface, and ribbon anchoring means including a male latch having one end forming a reentrantly curved flexible hinge integral with said wall and a free end, and a female latch forming a hook for receiving said free end of said male latch to anchor an end of said ribbon therebetween, wherein said latches when in ribbon-anchoring position have their outer surfaces disposed as extensions of said peripheral surface of said segmental cylindrical wall, said male latch is narrower than the space between said side flanges and each of said side flanges is provided with an aperture opposite said ribbon anchoring means to facilitate attachment and removal of said ribbon.
Claim 2
Dependent Claim
148 words
A one piece plastic spool for an inking ribbon, comprising a pair of parallel side guide flanges, a central cylindrical hub, a segmental cylindrical wall spaced outwardly from said hub interconnecting said side flanges and having a ribbon-receiving peripheral surface, and ribbon anchoring means including a male latch having one end forming a reentrantly curved flexible hinge integral with said wall and a free end, and a female latch forming a hook for receiving said free end of said male latch to anchor an end of said ribbon therebetween, wherein said latches when in ribbon-anchoring position have their outer surfaces disposed as extensions of said peripheral surface of said segmental cylindrical wall, said male latch is narrower than the space between said side flanges and each of said side flanges is provided with an aperture opposite said ribbon anchoring means to facilitate attachment and removal of said ribbon.
Claim 3
Dependent Claim
29 words
In a ribbon spool according to claim 1, radial ribs joining said hub, said segmental cylindrical wall, said female latch and said flexible hinge end of said male latch.
Claim 4
Dependent Claim
32 words
In a ribbon spool according to claim 1, a radial protuberance extending inwardly from and formed integrally with said central cylindrical hub to effect snap-fit mounting of said spool on a post.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |